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Finding the Fourth Proportional to 615,657.90, 921,931.65 and 404,150.70

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Solution

The fourth proportional to 615,657.90, 921,931.65 and 404,150.70 is: 605,205.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    615,657.90 : 921,931.65 = 404,150.70 : x
  2. Step 2: Convert to fraction form
    615,657.90/921,931.65 = 404,150.70/x
  3. Step 3: Cross multiply
    615,657.90x = 921,931.65 × 404,150.70
  4. Step 4: Simplify right side
    615,657.90x = 372,599,321,699.66
  5. Step 5: Solve for x
    x = 372,599,321,699.66/615,657.90
  6. Step 6: Final answer
    x = 605,205.13

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.